“Santorum pushed for billions in wasteful pork -- voting for the Bridge to Nowhere, a teapot museum, even an indoor rain forest," the ad's narrator says. "Santorum voted to raise the debt limit five times, increasing spending and debt by $3 trillion."

The ad continues, "He even voted to let convicted felons vote.”

*** UPDATE *** Per NBC's Anthony Terrell, Santorum commented on this TV ad: "I'm being attacked in an ad I find it very interesting that Gov. Romney's Super PAC is already up with ads in Florida against me. So they must have some idea of who might be coming strongly out of South Carolina.